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Experimental Study on the Reservoir Character and Seepage Law of Ultra-low Permeability Glutenite Reservoirs of Huabei Oil Field

Author: LiZhiShuo
Tutor: LiuXianGui；YangZhengMing
School: seepage Institute of Fluid Mechanics
Course: Fluid Mechanics
Keywords: Ultra-low permeability glutenite Pore ??structure Sensitivity Movable fluid Seepage law Reservoir Classification
CLC: P618.13
Type: Master's thesis
Year: 2010
Downloads: 386
Quote: 3
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Abstract


Ultra-low permeability glutenite reservoir to in North China Wuliyasitai Oilfield different subjects controlled mercury, nuclear magnetic resonance, and physical simulation experimental means, comparing the microscopic pores of ultra-low permeability glutenite reservoir in North China structure and the movable fluid content, special the low penetration glutenite single phase and two-phase seepage law on this basis, a more systematic study. The main contents and results are as follows: 1, North China special low penetrating glutenite reservoir average throat radius and penetration was good exponential relationship between the radius of the throat is the main factor of the control reservoir permeability. Throat radius is small, the degree of heterogeneity, and the clay mineral content is more sandy conglomerate reservoir sensitivity of ultra-low permeability. 2, magnetic resonance imaging test results indicate that: the the T2 spectrum unimodal structure of ultra-low permeability glutenite reservoir increased the largest T2 relaxation time between sandstone and conglomerate, T2 cutoff value is higher than the conventional ultra-low permeability sandstone reservoirs; With significant penetration increases, movable fluid percentage moveable fluid porosity increases, the correlation changed for the better; penetration is lower and more heterogeneous degree. 3, by starting pressure gradient experiment shows that, for the same experimental rock samples, oil measured starting pressure gradient is greater than the water measured starting pressure gradient. With the increase of the permeability, the water, the oil measured start pressure gradient is gradually reduced, and a reduction gradually weakened. 4, in the water relative permeability test experiments, by considering the oil, water and viscosity, as well as oil, the aqueous phase of the effective permeability, were calculated to give an oil and the aqueous phase the maximum flow through the flow degree reflected and comparing each of ultra-low permeability sandy conglomerate reservoir of oil-water two-phase flow the degree of difficulty. 5, the combination of nuclear magnetic resonance and physical simulation, ultra-low permeability oil relative permeability curves test new methods. The method of correcting the irreducible water saturation and residual oil saturation, the experimental accuracy, penetration and oil displacement efficiency has been greatly strengthened; relative permeability curves for different permeability, T2 geometric mean and movable fluid percentage, movable oil saturation, imbibition efficiency, there is a good relationship between displacement efficiency and the total oil displacement efficiency. 6, according to the study of the North China special low penetration glutenite reservoir characteristics, combined with low permeability reservoirs and evaluation criteria predecessors established comprehensive evaluation method of the North China ultra-low permeability sandy conglomerate reservoir evaluation.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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